64b-66b meaning

A block line coding technique in which 8 data octets comprising 64 data bits is encoded into a block of 66 signaling bits prior to transmission. The data are scrambled in a self-synchronous scrambler function that is intended to even the distribution of 1s and 0s and thereby both achieve DC balance on the line and prevent intersymbol interference. See also balance, bit, block coding, line coding, DC, intersymbol interference, octet, and synchronize.
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